The 19th Annual Petaluma Poetry Walk takes place Sept. 21, 11 a.m. – 7 p.m. at eight venues. Beverly Burch, author of the recent Sixteen Rivers collection How a Mirage Works, will be reading with Donna Emerson and John Johnson at the Seed Bank, 199 Petaluma Blvd., N., at 11 a.m. See for full schedule.